The volume contraction of a solid copper cube of edge length 10 cm , when subjected to a hydraulic pressure of $7 \times 10^{6} \mathrm{~Pa}$, would be $\_\_\_\_$ $\mathrm{mm}^{3}$.
(Given bulk modulus of copper $=1.4 \times 10^{11} \mathrm{Nm}^{-2}$ )
