Yes, definitely look at your food packaging and eliminate bulky items. For example, the packaging for commercial freeze-dried meals is very bulky--repackage them in quart ziplock freezer bags. Consider taking couscous (a more compact and quicker cooking form of pasta) to replace noodles. Or take a rolling pin to your noodles to break them up into very small pieces.
I have easily put 3 breakfasts, 3 lunches and 3 dinners for 4 people in a BV500, so it is quite possible to squeeze a week's food in the thing.