Hawaii improved to 27-1 with the win, while Cal Poly fell to 20-8 in the regular-season finale for both schools.
The Wahine out-blocked the Mustangs, 11-5, and held Cal Poly to a -.011 hitting percentage. They also had nine service aces to Cal Poly's one.
Kari DeSoto led the Mustangs with nine kills and three blocks.
The Invitational's all-tournament team is listed below:
Heather Bown MB Hawaii (Most Valuable Player) Dana Burkholder S Arizona Kari DeSoto MH Cal Poly Lily Kahumoku LS Hawaii Jennifer Roberts RS Hawaii Jill Talbot OH Arizona
The NCAA Volleyball Tournament bracket will be announced Sunday at 8 p.m. MST.