After the post$-$apocalyptic rise of the undead in the fantasy world of The Walking Dead, Phillip Blake $($also known as the Governor$)$ began to collect the heads of the undead as his own personal trophies. In order to keep them semi$-$preserved, he placed the heads in an aquarium filled with $1000\mathrm{.}0$ mL of water. If the average human head has a mass of $4500\mathrm{.}0$ g and a density of $0\mathrm{.}6429$ g$/$mL$,$ what will be the final volume of water after the head is placed in the cylinder?