Your question is not complete, 7075 comes in a number of tempers F, O, H, W and T. There are 3 subdivisons H1 H2 H3. The degree of Strain hardened are next and follow the second digit following one of the two above, 2 = 1/4 hard, 4 = 1/2 hard 6 =3/4 hard, 8 = full hard. and lastly 9 = extra hard.
Anyway the most common 7075-T6 or T651. It is very nice to machine and has a tensile strenght of 83,000 psi and yield of 73,000 psi. So to kind of answer your question... if I look up 83 ksi that = 170 Brinell hardness. However most references list it at only 150 Brinell and I'm not sure why.