One "cc" is one cubic centimeter, which is the same as one millilitre (ml).
Ounces are a term used in non-metric countries, but the word might mean volume (like millilitres) or weight (like newtons or kilograms). I'll assume you mean volume.
Even here there is ambiguity, because fluid ounces (volume) in Britain and former British colonies is not the same as fluid ounces in America. You didn't say which units you use, so here are the conversions for both:
Imperial units (British) = 28.41 ml per ounce;
US units = 29.57 ml per ounce.
If you meant ounces of weight, the conversions are quite different and would depend on the density of the substance you are measuring. As well, there is the avoirdupois ounce (US system) and the apothecary ounce.
All the confusion can easily be avoided if one uses the metric system.
1 cc = 1 cubic centimeter = 10-6 cubic meters = 1 millilitre = .001 litres and if it is water, then 1 millilitre = 1 gram.
So find the conversion for the "ounce" you want and just divide.
Hope this helps,
Stephen La Rocque.