The volume of a right rectangular prism is given by the formula below
[tex]V=\text{whl}[/tex]Thus, in our case,
[tex]V=7\cdot11\cdot14.5=1116.5[/tex]The volume of the container is 1116.5ft^3.
Finally, multiply the total volume by the density given in the problem, as follows
[tex]\begin{gathered} \text{weight}=1116.5\cdot0.83=926.695 \\ \Rightarrow\text{weight}\approx927 \end{gathered}[/tex]Rounded to the nearest pound, the answer is 927 pounds.