You can actually make that 7 a 10. You get +2 to an attribute of your choice as a human. If you put it in Strength to get 18 (so Strength is 16 without it), and you raise your constitution to where it is, you've actually only spent 13 points. You could even do 
STR: 18 DEX: 13 CON: 15 INT: 10 WIS: 10 CHA: 10. 
That adds up to 20, and gives you a dexterity bonus, too. ^~^ That +2 really helps~