5.32. Find the volume of a triangular pyramid constructed on vectors $\overline{O A}, \overline{O B}$, and $\overline{O C}$, if $|\overrightarrow{O A}|=5,|\overrightarrow{O B}|=2,|\overrightarrow{O C}|=6, \overline{O A} \cdot \overrightarrow{O B}=0$, $\overline{O A} \cdot \overline{O C}=0, \overline{O B} \cdot \overline{O C}=8$.