My husband had the same Cisplatin protocol (3 treatments, 21 days apart, in conjunction with 33 radiation treatments), and he didn't experience any hair loss from the chemo. He did lose all of his facial hair and the hair on the nape of his neck from radiation, though.
Husband diagnosed 10/11/12 with Stage III oral tongue SCC, T3N1M0 (HPV negative). 35 years old, non-smoker, non-drinker.
Hemiglossectomy and left selective neck dissection (levels 2, 3, and 4) on 11/01/12.
Chemo (Cisplatin x 3) finished 1/23/13.
Radiation finished 1/28/13.
| 
