The following pie chart gives the measures of the central angles of the sectors that reflect the number of questions in each of 8 different books with respect to the total number of questions in these 8 books taken together.

If the number of questions in the books B3 and B6 taken together is 165, then what is the total number of questions in the 8 books taken together?

A

900

B

800

C

750

D

850