In an electrostatic field, the displacement vector is
\[
\vec{D}(x,y,z) = (x^3\,\vec{i} + y^3\,\vec{j} + xy^2\,\vec{k})\ \text{C/m}^2.
\]
A cube of side 1 m is centered at the origin with vertices at
\((\pm 0.5, \pm 0.5, \pm 0.5)\).
Find the electric charge enclosed within the cube (rounded to two decimals).