A spherical balloon is made from a material whose mass is $3\mathrm{.}40$ kg$.$ The thickness of the material is negligible compared to the $1\mathrm{.}50$ m radius of the balloon. The balloon is filled with helium $($He$)$ at a temperature of $315$ K and just floats in air, neither rising nor falling. The density of the surrounding air is $1\mathrm{.}19$ kg$/$m and the molar mass of helium is $4\mathrm{.}002610^-3$ kg$/$mol$.$ Find the absolute pressure of the helium gas.

Answer needs to be in Pa$.$