I'm curious on how the council can be pressuring your unit if no professional from Council has come to visit. Are they sending out volunteers from your district? Are they sending you letters that may be ham-handedly worded? Calling the unit leaders over and over again? I only ask because I have seen unit leaders read a form letter from Council suggesting funding levels from units for FOS contributions as demands and not requests, and have seen district Scouters come across as demanding when they give FOS presentations.
Yes, you can just say no - they can "demand" but you don't have to respond. Just because the Council has suggested/demanded certain funding levels doesn't mean you have to give them. It certainly seems unreasonable to me for a unit of about 8 Scouts to give a minimum of $1,000 to Council FOS.
You aren't under any obligation to give to FOS so you can feel free to ignore these requests/demands. The worst thing that Council can do is cancel your charter and terminate your unit - and I've yet to see a Council actually do that to a unit that has not responded to FOS - plus, the unit is already on the verge of disbanding over this so would it really matter if they did?
All of us have felt at one time or another that Councils go overboard on their FOS requests - a lot depends on the temperament of the Scout Executive/District Executives running these campaigns - one Scout Exec may try a soft-shoe approach, another goes a bit more hard core. We see the same thing happening with volunteers - some are really good at it and some are folks you want to grab by the scruff of the neck and escort them out of your meetings.
My recommendation is to ignore the tone, get everyone calmed down, and just ignore the "demands". Then, once everyone has taken their deep breaths, look at your program - are you utilizing any of the Council facilities? Summer Camp? Local campgrounds? If so, figure out the value to you and donate that. Is it worth $25 a Scout? If you aren't using Council facilities at all, maybe the value is $0 a Scout. Ignore the Council amounts and donate what you feel is best, or don't donate at all - then move on and keep delivering the program.