In a quantum book I am reading for self-study it is noted that the magnetic dipole moment of the $^3$Li$^7$ nucleus can be calculated as
$\mu = 1.67 \times 10^{-26} J\cdot T^{-1}.$
However there is not an explanation as to where this figure comes from. It seems like perhaps one should consider the structure of $^3$Li$^7$ in some way as to calculate the magnetic moment in a similar way to the Bohr magnetron? Besides this I'm at a loss here with how to arrive at this value for $\mu$, can anyone please explain where this comes from?