It will definetely help to remove the air from your package.I've done it with zip lock baggies and a sink full of water.It works o.k. but is not very reliable.
I was in costco the other day and they had the really nice Foodsaver vacuum packer,with adjustable vacuum and jar sealer for $159,Its a great investment and will make almost anything last longer and taste fresher.We've cured our eggs and vacuum sealed them in a jar and you would,nt believe how well they turn out and last.
Look at your food lasting 2-3 years instead of 6-12 months when wrapped and frozen.
If you need to a lot of the butcher shops can vacuum pack for you for a pretty reasonable cost.