Converting a cubic centimeter fluid-volume measurement to a fluid ounce measurement involves multiplying your fluid-volume by the conversion ratio to find the result. A cubic centimeter is equal to 0.033814 fluid ounces, so to convert simply multiply by 0.033814.
For example, 5cm3 = (5 × 0.033814) = 0.16907fl oz.
Anwser to your question: 0.203