First point, setting the precept must be a full council decision, and it is not a decision that can be taken by a Parish meeting, , even though they could make their collective thoughts known at such a meeting. A Parish Meeting is not a Council meeting, but a meeting of local government electors registered for the area for which it is held. It must be held between 1st March and 1st June, normally outside the time you would have needed to set your precept..
Second Point: The purpose of a Parish Meeting is more than just to discuss the precept as exemplified by Pithead. Be aware that if you don't call a Parish Meeting, electors could in theory call one and set their own agenda, and chair (If nobody from the PC wanted to do it)..