I think you may have gotten your units mixed up. Shouldnt it be a yield of 53.33ml's NOT cc's?
1mL=1000uL =1000cc's
1cc=1uL (for those in the lab using a pipett)
If there are 75mg/mL and you have 4 grams (=4000mg's), just divied 4000mg's by your 75mg's = yielding 53.33mL of 75mg/mL solution.
Just trying to help