ANSWER
The closest measurement is 300cm³
EXPLANATION
The volume of a pyramid is:
[tex]V=\frac{1}{3}Bh[/tex]where B is the ares of the base and h is the height.
In this problem, B = 64cm² and h = 14cm. The volume is:
[tex]V=\frac{1}{3}\cdot64\operatorname{cm}^2\cdot14\operatorname{cm}=298.\bar{6}cm^3[/tex]The one that's closest is 300cm³