An L$-$C circuit containing an $90\mathrm{.}0$ mH inductor and a $1\mathrm{.}75$ nF capacitor oscillates with a maximum current of $0\mathrm{.}810$ A$.$Assuming the capacitor had its maximum charge at time t $=0,$ calculate the energy stored in the inductor after $2\mathrm{.}40$ ms of oscillation.