An electric dipole with a dipole moment of magnitude \(p = 5.0 \times 10^{-6} \text{ C}\cdot\text{m}\) is located in a uniform electric field of magnitude \(E = 4.0 \times 10^3 \text{ N/C}\). The dipole is initially oriented antiparallel to the electric field and is then rotated by \(180^\circ\) so that it is aligned parallel to the field. What is the change in the electric potential energy \(\Delta U\) of the dipole-field system during this rotation?